*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --y:      #f0ed1f;
  --y-dim:  rgba(240,237,31,.1);
  --y-mid:  rgba(240,237,31,.2);
  --bg:     #0a0a0a;
  --s1:     #111111;
  --s2:     #191919;
  --s3:     #222222;
  --border: #2a2a2a;
  --white:  #ffffff;
  --muted:  #777;
  --light:  #aaa;
  --r:      12px;
  --head:   'Space Grotesk', sans-serif;
  --body:   'Inter', sans-serif;
}
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--body); background: var(--bg); color: var(--white); line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--body); cursor: pointer; border: none; }
img { display: block; max-width: 100%; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ── UTILS ── */
.y { color: var(--y); }
.muted { color: var(--muted); }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  border: 1px solid rgba(240,237,31,.35); color: var(--y);
  border-radius: 100px; padding: 5px 14px; background: var(--y-dim);
}

/* ── Badge de categoría (PRO IA / CONTRA IA) — deliberadamente discreto: la idea es que
   nunca compita visualmente con el título del curso. Un punto de color en vez de un emoji
   grande, texto chico, sin negrita pesada. ── */
.cat-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: .66rem; font-weight: 600; letter-spacing: .03em; text-transform: uppercase;
  padding: 3px 10px 3px 8px; border-radius: 100px; line-height: 1.6;
}
.cat-badge .cat-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.cat-badge-pro { color: var(--y-text, var(--y)); background: var(--y-dim); }
.cat-badge-pro .cat-dot { background: var(--y-text, var(--y)); }
.cat-badge-contra { color: #2f6b3f; background: rgba(47,107,63,.10); }
.cat-badge-contra .cat-dot { background: #2f6b3f; }

/* ── Toggle de filtro por categoría (index, panel del alumno) ── */
.cat-filter { display: inline-flex; gap: 3px; padding: 4px; border-radius: 100px; background: var(--s2); border: 1px solid var(--border); }
.cat-filter button {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--body); font-size: .8rem; font-weight: 600;
  padding: 8px 16px; border-radius: 100px; background: transparent;
  color: var(--muted); transition: all .15s; white-space: nowrap;
}
.cat-filter button .cat-emoji { display: inline-flex; opacity: .85; flex: none; }
.cat-filter button.active { background: var(--white); color: var(--bg); }
.cat-filter button.active .cat-emoji { opacity: 1; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; border-radius: 8px; cursor: pointer; transition: all .2s; font-family: var(--body);
  text-decoration: none; border: none;
}
.btn-lg { padding: 16px 32px; font-size: 1rem; }
.btn-md { padding: 12px 24px; font-size: .9rem; }
.btn-sm { padding: 8px 16px; font-size: .8rem; }
.btn-y   { background: var(--y); color: #000; }
.btn-y:hover { background: #fff; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(240,237,31,.4); }
.btn-outline { background: transparent; color: var(--y); border: 1.5px solid var(--y); }
.btn-outline:hover { background: var(--y-dim); }
.btn-ghost { background: transparent; color: var(--light); }
.btn-ghost:hover { color: var(--white); }
.btn-danger { background: #c0392b; color: #fff; }
.btn-danger:hover { background: #e74c3c; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* ── NAV ── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,10,10,.92); backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--head); font-size: 1.3rem; font-weight: 700; color: var(--white); }
.logo span { color: var(--y); }
.nav-links { display: flex; align-items: center; gap: 8px; }

/* ── NAV MOBILE: hamburguesa + sidebar completo (el header no entra en una fila en mobile) ── */
.nav-hamburger {
  display: none; position: relative; width: 40px; height: 40px; z-index: 300;
  background: none; border: none; cursor: pointer; padding: 0; flex-shrink: 0;
}
.nav-hamburger span, .nav-hamburger span::before, .nav-hamburger span::after {
  content: ''; position: absolute; left: 9px; width: 22px; height: 2px;
  /* #fff explícito, no var(--white): el nav siempre es oscuro (marca), pero algunas
     páginas (ej. index.html) redefinen --white para su propio tema claro de contenido. */
  background: #fff; border-radius: 2px; transition: transform .2s, opacity .2s, top .2s;
}
.nav-hamburger span { top: 19px; }
.nav-hamburger span::before { top: -7px; }
.nav-hamburger span::after { top: 7px; }
.nav-hamburger.open span { background: transparent; }
.nav-hamburger.open span::before { top: 0; transform: rotate(45deg); }
.nav-hamburger.open span::after { top: 0; transform: rotate(-45deg); }
.nav-backdrop {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.55);
  z-index: 150; opacity: 0; transition: opacity .2s;
}
.nav-backdrop.open { display: block; opacity: 1; }

@media (max-width: 767px) {
  /* Hamburguesa + drawer del mismo lado que el sidebar fijo de desktop (izquierda) —
     antes el hamburguesa quedaba a la derecha del logo y el drawer abría desde ahí,
     mientras que el sidebar de cuenta en desktop vive a la izquierda: la navegación
     "saltaba" de lado según el ancho de pantalla. */
  /* :has() para no tocar checkout/course/login/register, que no tienen hamburguesa
     (overridean .nav-links a position:static más abajo en su propio <style>) y
     dependen del space-between original para su layout de 1-2 links. */
  .nav-inner:has(.nav-hamburger) { justify-content: flex-start; gap: 14px; }
  .nav-hamburger { display: block; order: -1; }
  .nav-links {
    position: fixed; top: 0; left: 0; right: auto; z-index: 200;
    width: min(80vw, 320px); height: 100vh; height: 100dvh;
    background: #0a0a0a; border-right: 1px solid var(--border);
    flex-direction: column; align-items: stretch; gap: 6px;
    padding: 90px 20px 24px; box-sizing: border-box;
    transform: translateX(-100%); transition: transform .25s ease;
    box-shadow: 12px 0 32px rgba(0,0,0,.4); overflow-y: auto;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { width: 100%; justify-content: center; padding: 14px 16px; font-size: .95rem; }
  body.nav-open { overflow: hidden; }
}
/* Separa la cuenta (Iniciar sesión / Mi panel) del resto de los links de navegación —
   en el drawer mobile queda más abajo con un separador; en desktop, un poco de aire. */
.nav-auth-sep { margin-left: 8px; }
@media (max-width: 767px) {
  .nav-auth-sep { margin-left: 0; margin-top: 14px; padding-top: 20px !important; border-top: 1px solid var(--border); }
}
/* Home y Blog solo en el drawer mobile — en desktop el header queda demasiado cargado
   con los 6 links de marketing + la cuenta. */
.nav-mobile-only { display: none; }
@media (max-width: 767px) {
  .nav-mobile-only { display: inline-flex; }
}
/* Inverso de nav-mobile-only — visible en desktop (default), oculto en el drawer mobile.
   Para las páginas de cuenta (dashboard/perfil/certificados/compras): en el drawer mobile
   no hace falta repetir toda la nav de marketing, con Contacto alcanza. */
@media (max-width: 767px) {
  .nav-desktop-only { display: none; }
}

/* ── SIDEBAR DE CUENTA (dashboard / perfil / certificados) ──────────────────
   En mobile la cuenta vive en el drawer del hamburguesa de arriba. En desktop
   (>=768px, mismo corte que el hamburguesa) se reemplaza por un panel fijo
   pegado al borde izquierdo, mismo fondo oscuro y look que ese drawer — no
   un card flotando en medio del contenido. Colores hardcodeados (no var(--light)
   etc.) a propósito: estas páginas redefinen esas variables para su tema claro
   de contenido, pero el sidebar, como el nav, es siempre oscuro. */
.account-sidebar {
  display: none;
}
@media (min-width: 768px) {
  .account-sidebar {
    display: flex; flex-direction: column; gap: 2px;
    position: fixed; top: 0; left: 0; bottom: 0; width: 230px; z-index: 90;
    background: #0a0a0a; border-right: 1px solid #2a2a2a;
    padding: 90px 14px 24px; box-sizing: border-box; overflow-y: auto;
  }
  .account-main { margin-left: 230px; }
}
.account-sidebar-name { font-size: .8rem; color: #888; padding: 0 10px 14px; margin-bottom: 8px; border-bottom: 1px solid #2a2a2a; word-break: break-word; }
.account-nav-link {
  display: flex; align-items: center; gap: 8px; padding: 11px 10px; border-radius: 8px;
  color: #bbb; text-decoration: none; font-size: .875rem; font-weight: 500;
  transition: background .15s, color .15s;
}
.account-nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.account-nav-link.active { background: rgba(240,237,31,.12); color: var(--y); font-weight: 700; }
.account-sidebar-logout {
  display: flex; align-items: center; gap: 8px; margin-top: 8px; padding: 11px 10px;
  border: none; border-top: 1px solid #2a2a2a; border-radius: 0; background: none;
  color: #888; font-size: .875rem; font-family: var(--body); text-align: left; cursor: pointer;
}
.account-sidebar-logout:hover { color: #fff; }
.account-nav-link svg, .account-sidebar-logout svg { width: 18px; height: 18px; flex-shrink: 0; }
/* Admin toggle del drawer mobile: solo se ve si el JS agrega .is-admin Y estamos en mobile.
   No usamos display inline en JS acá porque pisaría el media query de arriba/abajo. */
#adminToggleMobile { display: none; }
@media (max-width: 767px) {
  #adminToggleMobile.is-admin { display: inline-flex; }
}

/* ── CARDS ── */
.card {
  background: var(--s1); border: 1px solid var(--border); border-radius: var(--r);
  padding: 24px; transition: border-color .2s;
}
.card:hover { border-color: rgba(240,237,31,.3); }

/* ── FORMS ── */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .85rem; color: var(--light); margin-bottom: 8px; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px;
  background: var(--s2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--white); font-family: var(--body); font-size: .95rem;
  transition: border-color .2s; outline: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { border-color: var(--y); }
.form-group textarea { min-height: 120px; resize: vertical; }

/* ── PROGRESS BAR ── */
.progress-bar { background: var(--s3); border-radius: 100px; height: 6px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--y); border-radius: 100px; transition: width .5s ease; }

/* ── BADGES ── */
.badge { display: inline-block; padding: 3px 10px; border-radius: 100px; font-size: .75rem; font-weight: 700; }
.badge-green { background: rgba(39,174,96,.15); color: #2ecc71; }
.badge-yellow { background: var(--y-dim); color: var(--y); }
.badge-gray  { background: var(--s3); color: var(--muted); }
.badge-red   { background: rgba(192,57,43,.15); color: #e74c3c; }

/* ── MODULE CONTENT ── */
.module-content { color: var(--light); line-height: 1.8; }
.module-content h2 { font-family: var(--head); color: var(--white); font-size: 1.3rem; margin: 28px 0 12px; }
.module-content h3 { color: var(--white); font-size: 1.05rem; margin: 20px 0 8px; }
.module-content p { margin-bottom: 14px; }
.module-content ul, .module-content ol { padding-left: 24px; margin-bottom: 14px; }
.module-content li { margin-bottom: 6px; }
.module-content strong { color: var(--white); }
/* Las tablas del contenido pueden tener columnas anchas (texto largo en celdas) que en
   mobile no entran en el ancho de pantalla. En vez de que desborden y muevan toda la
   página hacia el costado, que scrolleen solo ellas mismas, contenidas en su propio ancho. */
.module-content table { display: block; max-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.module-content a { color: var(--y-text, var(--y)); text-decoration: underline; }
.module-content blockquote {
  border-left: 3px solid var(--y); padding: 12px 20px; background: var(--y-dim);
  border-radius: 0 8px 8px 0; margin: 20px 0; color: var(--white); font-style: italic;
}
.module-content .code-block {
  background: #0d1117; border: 1px solid var(--border); border-radius: 8px;
  padding: 20px; margin: 16px 0; overflow-x: auto;
}
.module-content .code-block pre {
  margin: 0; font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: .85rem; color: #e6edf3; line-height: 1.7;
}
.module-content .code-block code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  font-size: .85rem; color: #e6edf3; line-height: 1.7;
}
.module-content code:not(.code-block code) {
  background: var(--s3); padding: 2px 7px; border-radius: 4px;
  font-family: 'JetBrains Mono', monospace; font-size: .82rem; color: var(--y-text, var(--y));
}
.module-content kbd {
  background: var(--s3); border: 1px solid #444; border-radius: 4px;
  padding: 2px 6px; font-size: .8rem; color: var(--light);
}
.module-content .highlight-box {
  background: var(--y-dim); border: 1px solid rgba(240,237,31,.2);
  border-radius: 8px; padding: 16px 20px; margin: 16px 0;
}
.module-content .highlight-box p { margin-bottom: 6px; color: var(--white); }
.module-content .exercise-box {
  background: rgba(52,152,219,.08); border: 1px solid rgba(52,152,219,.25);
  border-radius: 8px; padding: 16px 20px; margin: 16px 0;
}
.module-content .exercise-box strong { color: #3498db; }
.module-content .book-rec {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--s2); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 18px; margin: 20px 0;
}
.module-content .book-rec img {
  width: 56px; border-radius: 4px; flex-shrink: 0; box-shadow: 0 4px 14px rgba(0,0,0,.35);
}
.module-content .book-rec-label {
  font-size: .68rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  color: var(--y-text, var(--y)); margin-bottom: 5px;
}
.module-content .book-rec p:not(.book-rec-label) { margin-bottom: 8px; color: var(--white); font-size: .92rem; }
.module-content .book-rec a { color: var(--y-text, var(--y)); font-weight: 600; font-size: .85rem; }

/* ── QUIZ ── */
.quiz-option {
  width: 100%; text-align: left; padding: 14px 18px;
  background: var(--s2); border: 1.5px solid var(--border); border-radius: 8px;
  color: var(--white); font-size: .9rem; cursor: pointer; transition: all .2s; margin-bottom: 10px;
  display: flex; align-items: flex-start; gap: 12px;
}
.quiz-option:hover:not(:disabled) { border-color: var(--y); background: var(--y-dim); }
.quiz-option.correct  { border-color: #2ecc71; background: rgba(46,204,113,.1); }
.quiz-option.wrong    { border-color: #e74c3c; background: rgba(231,76,60,.1); }
.quiz-option:disabled { cursor: not-allowed; }
.quiz-letter { font-weight: 700; color: var(--y); flex-shrink: 0; width: 20px; }
.quiz-feedback {
  padding: 16px 20px; border-radius: 8px; margin-top: 16px; line-height: 1.6;
}
.quiz-feedback.ok   { background: rgba(46,204,113,.1); border: 1px solid rgba(46,204,113,.3); color: #2ecc71; }
.quiz-feedback.fail { background: rgba(231,76,60,.1);  border: 1px solid rgba(231,76,60,.3);  color: #e74c3c; }
.quiz-feedback p { margin: 0; color: var(--light); font-size: .9rem; }

/* ── CHAT ── */
.chat-bubble {
  position: fixed; bottom: 28px; right: 28px; z-index: 200;
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--y); color: #000; font-size: 1.4rem;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; box-shadow: 0 4px 20px rgba(240,237,31,.4);
  transition: transform .2s;
}
.chat-bubble:hover { transform: scale(1.1); }
.chat-window {
  position: fixed; bottom: 92px; right: 28px; z-index: 200;
  width: 360px; height: 480px;
  background: var(--s1); border: 1px solid var(--border); border-radius: 16px;
  display: flex; flex-direction: column; overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,.6);
}
.chat-header { padding: 14px 18px; border-bottom: 1px solid var(--border); background: var(--s2); }
.chat-header strong { font-family: var(--head); font-size: .95rem; }
.chat-header small { color: var(--muted); font-size: .75rem; display: block; }
.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.chat-msg { max-width: 85%; padding: 10px 14px; border-radius: 10px; font-size: .85rem; line-height: 1.5; }
.chat-msg.user { background: var(--y); color: #000; align-self: flex-end; border-bottom-right-radius: 3px; }
.chat-msg.assistant { background: var(--s3); color: var(--light); align-self: flex-start; border-bottom-left-radius: 3px; }
.chat-input-area { padding: 12px; border-top: 1px solid var(--border); display: flex; gap: 8px; }
.chat-input-area input { flex: 1; background: var(--s2); border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; color: var(--white); font-size: .85rem; outline: none; }
.chat-input-area input:focus { border-color: var(--y); }

/* ── TOAST ── */
.toast-container { position: fixed; top: 80px; right: 24px; z-index: 999; display: flex; flex-direction: column; gap: 10px; }
.toast {
  padding: 14px 20px; border-radius: 8px; font-size: .875rem; min-width: 280px;
  box-shadow: 0 4px 20px rgba(0,0,0,.4); animation: slideIn .3s ease;
}
.toast.success { background: #1a3d28; border-left: 3px solid #2ecc71; color: #2ecc71; }
.toast.error   { background: #3d1a1a; border-left: 3px solid #e74c3c; color: #e74c3c; }
.toast.info    { background: var(--s2); border-left: 3px solid var(--y); color: var(--y); }
@keyframes slideIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }

/* ── MODAL ── */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.8); z-index: 300; display: flex; align-items: center; justify-content: center; padding: 24px; }
.modal { background: var(--s1); border: 1px solid var(--border); border-radius: 16px; width: 100%; max-width: 560px; max-height: 90vh; overflow-y: auto; }
.modal-header { padding: 24px 28px 0; }
.modal-body { padding: 20px 28px; }
.modal-footer { padding: 0 28px 24px; display: flex; gap: 12px; justify-content: flex-end; }

/* ── TABLES ── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
th { text-align: left; padding: 12px 16px; color: var(--muted); font-weight: 600; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 14px 16px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--s2); }

/* ── AUTH PAGES ── */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; }
.auth-card { width: 100%; max-width: 420px; background: var(--s1); border: 1px solid var(--border); border-radius: 16px; padding: 40px 36px; }
.auth-card h1 { font-family: var(--head); font-size: 1.6rem; margin-bottom: 8px; }
.auth-card p.sub { color: var(--muted); margin-bottom: 28px; font-size: .9rem; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .chat-window { width: calc(100vw - 32px); right: 16px; bottom: 84px; }
  .chat-bubble { right: 16px; bottom: 24px; }
}